52249140 has 72 divisors (see below), whose sum is σ = 159207048. Its totient is φ = 13870080.

The previous prime is 52249121. The next prime is 52249157. The reversal of 52249140 is 4194225.

It can be written as a sum of positive squares in 4 ways, for example, as 22240656 + 30008484 = 4716^2 + 5478^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50064 + ... + 51096.

It is an arithmetic number, because the mean of its divisors is an integer number (2211209).

Almost surely, 2^52249140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52249140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79603524).

52249140 is an abundant number, since it is smaller than the sum of its proper divisors (106957908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52249140 is a wasteful number, since it uses less digits than its factorization.

52249140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329 (or 1324 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 52249140 is about 7228.3566597118. The cubic root of 52249140 is about 373.8462673763.

The spelling of 52249140 in words is "fifty-two million, two hundred forty-nine thousand, one hundred forty".